Four of us did the 4pm cruise, 2 adults, and 2 teens. Wasn't crowded, and saw a number of dolphins, which we really enjoyed. The captain was knowledgeable, but somewhat monotone (like he was a bit bored of repeating the same thing day after day), and seemed to speak too much about Dafuskie Island. We did a dolphin kayak cruise a few years ago and I'd recommend that over a boat cruise if you're up for the activity.